| Place Name | South River |
| Place Type | Borough |
| ZIP Code(s) | 08882 |
| County | Middlesex County |
| Area Code(s) | 732,848 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 15,992 |
| Population Growth Rate (2010-19) | 0.69% |
| Majority Ethnicity | White 67.66% |
| Metro/Micro Stats Area | New York-Newark-Jersey City, NY-NJ-PA |
| US Congressional District(s) | New Jersey 12th |
| State Assembly Districts | 18 |
| State Senate Districts | 18 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 67.66% |
| African American | 7.63% |
| Hispanic | 0.05% |
| Asian | 2.39% |
| Native American | 0.11% |
| Hawaiin/Pacific Islander | 22.15% |